Polymeric additives and polymeric articles comprising said additive
US6777496B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 7, 2001 |
| Grant date | Aug 17, 2004 |
| Priority date | — |
| Expiry date | Feb 7, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249933
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
We have developed a process and product which provide thermoplastic articles featuring a permanent outer surface which has selectively varied chemical functionality while maintaining the inherent mechanical properties of the base fiber. The process comprises the steps of:(a) adding a substantially organic molten component with CSP value of at least 8 to a molten thermoplastic polymer and mixing to substantially uniformly disperse the molten component in the molten thermoplastic polymer and form a heterogeneous blend wherein(i) the melt viscosity of the molten component is substantially less than the melt viscosity of the molten thermoplastic polymer; and(ii) the amount of the molten component in the molten thermoplastic polymer is up to about ten percent by weight based on the heterogeneous blend; and(b) melt processing the heterogeneous blend wherein the molten component preferentially locates near the surface of the molten thermoplastic polymer and substantially no chemical reaction occurs between the molten component and the molten thermoplastic polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.